Temperature overshoot, bad reporting

[ExplodedZombie]

Hello! I am still really new to all this, so forgive me for not being able to find a thread that is close to my issue, but here goes:

I installed one of these right during the initial build of my Rostock Max V2: http://www.ebay.com/itm/Modular-Screw-o ... QoXAmVsKVA

I read a few threads that recommended them because they were easier to deal with. So, I have set my sensor type to 1 (Epcos 100k type) and defined the following:

#define NUM_TEMPS_USERTHERMISTOR0 20
#define USER_THERMISTORTABLE0 {\
{1,821},{54,252},{107,207},{160,182},{213,165},{266,152},{319,141},{372,131},{425,123},{478,115},\
{531,107},{584,100},{637,93},{690,86},{743,78},{796,70},{849,60},{902,49},{955,34},{1008,3} }

However, when I set my Nozzle heat to 30 (just for test) the NOZ: appears to be ~ 39. Meanwhile, my pocket thermometer probe thing is reporting ~ 31.

Does anyone have advice for this situation? I set my PID using autotune and still having serious issues. Should I uninstall this thermistor and reinstall the original? It seemed so dinky.

[Xenocrates]

The beta value in use in the firmware with the sending hardware is not accurate at low temperatures. It would only be apparent that there's an actual issue if it is incorrect at operating temperature, while the PID loop is again not tuned for these temperatures. Unless you have issues at printing temps, I wouldn't worry much

[ExplodedZombie]

I ran PID again with the sensor type 1, and it seemed to work. I set it to 200 and it got up to 202 then hung around 199-201. Pretty good!

Then I checked the temperature of the nozzle by placing a "pocket thermometer" (https://www.amazon.com/gp/product/B004W ... UTF8&psc=1) and it is reporting ~238. I ordered an infrared temperature gun meant for automotive work just in case. Will probably just fall back on the E3D V6 thermistor in hopes it will be more accurate.

By the way Xenocrates, your forum image is awesome. My plan is to start printing Mechwarrior Online models if I can ever get this thing working right.